Status of theStatus of theBeetle Readout for the MaPMTsBeetle Readout for the MaPMTs

history of events documentation of setup prospects of near future

RICH meeting, CERN, 05.09.2003RICH meeting, CERN, 05.09.2003 Stephan EisenhardtStephan EisenhardtUniversity of EdinburghUniversity of Edinburgh

RICH meeting, CERN, 05.09.2003 Stephan Eisenhardt 2

History of Events IHistory of Events I

Thu 14.08.: first ever boardBeetle 1.2 finished and shipped to Edinburgh Fri 15.08.: lorry of carrier crashed in road accident Mon 18.08.: shipment of first boardBeetle 1.2 arrived at Edinburgh

visual inspection: board OK Wed 20.08.: first data frames after sorting out problems in the I2C level

adaptation and the temporary cabling Wed 20.08.: first boardBeetle 1.2MA0 finished and shipped to Edinburgh Thu 21.08.: adaptation of FED to differential read-out and

first ever LED light signals via DAQ chain (boardBeetle 1.2) success!!(although a limitation of the dynamic range was observed – amplifier saturates?!?)

Fri 22.08.: test of boardBeetle 1.2MA0 success!

Sat 23.08.: pack and go

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History of Events IIHistory of Events II Sun 24.08.-Wed 27.08.: troubleshooting of interference between WinXP,NI-

interface and Labview on DAQ PC Mon 25.08.: 4 more boardBeetle 1.2 delivered to CERN Wed 27.08.: move into beam area Thu 28.08.-Fri 29.08.: infrastructure & cabling for missing interface board Sat 30.08.: tuning of timing &

first data frames with LED light and one boardBeetle 1.2 Sun 31.08.: tuning of setup for Cherenkov light &

first Cherenkov photons with one boardBeetle 1.2 Mon 01.09.: cabling for the MaPMT cluster due to missing interface board Tue 02.09.: I2C problems with cluster work around found Wed 03.09.: mounting & tuning of cluster of 8 8-dynode stage MaPMT Thu 04.09.: tuning of read-out map for right geometry match &

first ring of Cherenkov photons success!! Thu 04.09.: 1 spare differential FED & 1 more boardBeetle 1.2 delivered to

CERN (with saturation of amplifier cured)

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Beetle 1.2 chip: pre-bondingBeetle 1.2 chip: pre-bonding

pads ofpitch adapter

pipelinefront-

end

digital

engine

pads of Beetle analogue input

pads of Beetle I/O

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Zoom for probe-tested ChipZoom for probe-tested Chip

marks of probe needles made some problems at bonding

-

but finally it worked

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Equipped boardBeetleEquipped boardBeetle

10x8 PGAs(2 rows GND pins)

Level 0: “back side”

Level 5: “front side”

preamp,analog, digital, comparatorGND connections

pitch adapter Beetle chip

protective plastic cap

buffer capacitiesand terminators

4x differential amplifiers

4x differential line drivers

4x single ended probe pins

powerSEQSI & I2C

4x differential out

I2C address

4x pot for DC offset

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Cluster SetupCluster Setup

base plate for mounting and grounding

Cambridgebleeder board

5x boardBeetlewith Beetle 1.2 8-dynode stage

MaPMT

grounding points

slits to accesspotentiometers

mounting holes for lens mount

mounting holes formount to vessel

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Cluster Setup: zoomCluster Setup: zoom

HV point

rotation of 4 bleeder chains

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Cluster Setup: vesselCluster Setup: vessel

boardBeetle

base plate

pivot point

MaPMT

bleeder board

photon direction

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Interface Board is missing…Interface Board is missing…

3.3V power linefor LVDS fan-out

boardsdesigned positionof interface board

daisy chain ofpower cables

5x LVDS fan out boards

I2C bus

2 cable trees to distribute LVDS signals

to boardBeetles

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Prospects of the Near FutureProspects of the Near Future Mount lenses Equip full 9 MaPMT cluster with 8-dynode/Beetle1.2 Planned measurements:

– HV scans with Cherenkov and LED light– Latency and pulse shape scan– Threshold scan with binary readout

Expect to fix saturation problem of amplifier Expect to extend dynamic range in FED Hope to get up to 5 boardBeetle with Beetle1.2MA0 early next week

to repeat some of the measurements with the second cluster In the lab: get interface board and prove functionality In the lab: cure I2C problem with cluster

Many thanks to all who made this possible!!!